sextuplicate

adj

1. (not-comparable)Six times the number, volume, length, etc. (of something else).

   “The customer ordered a sextuplicate quantity.”

2. (not-comparable)Comprising six identical parts.

   “Benzene is a sextuplicate hydrocarbon.”

noun

1. A series, set, collection, or group of six identical copies of something.

   “1945: United States Twelfth Army, Report of Operations: Final After Action Report, PAGE UNKNOWN If the official receipt is not available, the appropriate CA officer will prepare a similar receipt in sextuplicate.”

   “…signed (in quadruplicate for the Financial Office, quintuplicate for the Registrar, and, inexplicably, sextuplicate for the Health Department).”

verb

1. (transitive)To make six copies of.

   “Sextuplicate this document for me, please.”